Scientists find new variations among sperm cells

The behavior of sperm cells is due, in part, to the individual DNA make-up of these cells, rather than only to the genetics of males, finds a team of scientists. Its results, which provide a new understanding of the competition ...

Evolution of cooperation through cumulative reciprocity

Understanding reciprocal cooperation is a key element to understanding how people work together. Whether it is friends who exchange favors, animals who exchange food or services, or nations that coordinate their policies, ...

Capturing the onset of stem cell differentiation in the skin

Researchers at Karolinska Institutet and at Yale University in U.S. have uncovered how stem cells behave in real-time while adapting their gene expression for differentiation. The study is published in the journal Nature ...

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Differences

"Differences" is the title of a number-one R&B single by singer Ginuwine. The hit song spent four weeks at number-one on the US R&B chart.This is Ginuwine's best selling and top charting single yet in his career, also peaking at number four on the main US pop chart.

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